21798153

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:315

約数の個数: 40

約数和(自身を含む): 35560448

約数和(自身を除く): 13762295

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 127, 163, 351, 381, 489, 1053, 1143, 1467, 1651, 2119, 3429, 4401, 4953, 6357, 10287, 13203, 14859, 19071, 20701, 44577, 57213, 62103, 133731, 171639, 186309, 269113, 558927, 807339, 1676781, 2422017, 7266051, 21798153]

約数ペア:

[(1, 21798153), (3, 7266051), (9, 2422017), (13, 1676781), (27, 807339), (39, 558927), (81, 269113), (117, 186309), (127, 171639), (163, 133731), (351, 62103), (381, 57213), (489, 44577), (1053, 20701), (1143, 19071), (1467, 14859), (1651, 13203), (2119, 10287), (3429, 6357), (4401, 4953)]